.... Effectiveness of the method to construct acute PEBI grids honoring geological objects and complex wells is demonstrated by meshing representative reservoir geometries. Numerical results are presented that verify consistency of the two-point flux on the resulting boundary-aligned acute PEBI grids. Development...

... accurate velocity fields. To overcome the issues associated to the complex geometries and, at the same time, retaining the quality of the solutions, we present here the virtual element method to solve the Darcy problem, in mixed form, in presence of curved interfaces in two and three dimensions...

... and well index values capture the radial effects and avoid the numerical pseudo-skin typically observed with 2.5D grids. As illustrated with various cases, such approach accurately and consistently simulates wells of complex geometries for all resolutions. The outcome is a new method for generating 3D...

... of geological model permeability to gridblock scale permeability. Unstructured Gridding As we start to introduce more complex fracture geometries, the use of Cartesian grids becomes limiting. For example, we may have non-planar secondary fractures or non-vertical hydraulic fractures. While linear flow...

... geometries that describe geologic heterogeneities (e.g. faults, stratigraphic, sedimentologic and/or diagenetic features) are modelled as discrete volumes bounded by surfaces, without reference to a predefined grid. These surfaces, and also well trajectories, are created and modified using intuitive...

.... Great advances are being made in modeling complex structural scenarios with either truncated or stair-step grids. However some key stratigraphic features are commonly modeled with simplified geometries (e.g. use of simple layering styles) that are limited in their ability to represent stratigraphic...

... grids generated should be fault aligned. Pinch-outs Recovery: In reservoir simulation Pinch-outs are frequent, so any grid generation method employed should conform to their geometries. The unstructured grids used in reservoir modelling, commonly employ Delaunay-voronoi(PEBI) grids...

... that are universally applicable, rigorous and robust, simple to implement, and computationally inexpensive at the same time. The proposed multi-point well connection (MPWC) method combines these attributes by capturing the true geometry of the coupling cell and its well perforations, internal anisotropy and external...

... is attractive owing to high-order accuracy, the associate computational costs are prohibitive for simulations in complex 3D geometries (e.g., a 1-D calculation requires 2 x 3 velocity nodal values for each phase) and larger number of calculated fields (e.g. compositional and compressible flows, Gomes et al...

... surfaces of a reservoir, the location and orientation of faults within the reservoir, and the location and size of pinchouts. Upstream Oil & Gas history matching Artificial Intelligence quantification reservoir simulation geological structure geometry pinchout reservoir model Cartesian...

... for unstructured grid simulation. The paper describes a method to generate unstructured grids which conform to complex well paths in field-scale simulation. The method uses a multi-level approach to place cells optimally within the solution domain based on the "regions of interests". The wellbore geometry...

... Artificial Intelligence polyhedra reservoir simulation spe reservoir simulation symposium Halfedge Implementation polyhedron vertex polygon geometry data structure Modeling & Simulation stratigraphy depositional space cut-cell grid algorithm modeling flow simulation triangle...

... Abstract An accurate and efficient reservoir modeling process is essential for developing and producing hydrocarbon reserves, especially from unconventional resources. In this paper, we address some of the main challenges associated with modeling complex reservoir geometry and heterogeneous...

... in the numerical calculation of flux and spatial error. spe 92873 flux equation upstream oil & gas streamline simulation algorithm geometry pollock trajectory convergence corner point cell discretization streamline spatial error discretization error streamtube flight calculation...

... breakthrough upstream oil & gas rock matrix saturation equation simulation fractured rock geometry flow experiment relative permeability aperture fluid dynamics Introduction Oil is difficult to recover from fractured reservoirs but about 60% of the worlds remaining resources reside...

... location in the underlying simulation grid. However, the example later in this paper shows that the streamline geometries can be taken from a single coarse (i.e. upscaled) grid, and multiple sets of detailed, small-scale rock properties applied along them. In this case, values can be assigned using direct...

... society of petroleum engineers well model dimension spe 66357 permeability multi-block grid 27-point stencil grid stencil procedure reservoir simulation geometry boundary artificial intelligence equation reservoir trajectory finite difference stencil fluid dynamics society...

... generation technique, and thus allow more general grid flexibility. fluid dynamics coefficient equation split full tensor discretization operator flux grid generation hexahedral grid operator flow in porous media tetrahedral grid grid spe 66358 geometry artificial intelligence reservoir...

.... In this approach, matrix blocks of different volumes and shapes are associated to each fracture cell depending on the local geometry of the surrounding fractures. The matrix block geometry is determined using a rapid image processing algorithm. The great advantage of this approach is to simulate local matrix...

... gridblock voronoi grid triangulation geometry reservoir characterization boundary equation permeability tensor scaling method gridnode tetrahedron interface spe 37999 cartesian grid grid ABSTRACT The commonly used Cartesian and hybrid local grid refinements have the disadvantage...